Safety limiter for elevator hoister

Abstract

The utility model provides an elevator hoister safety limiter which comprises a guide rail and a safety limiting mechanism, an infrared sensor is installed on the inner side of the guide rail, the infrared sensor is tightly fixed to the guide rail and monitors the position of an elevator car, and a reflection mark is installed on the top of the elevator car and used in cooperation with the infrared sensor. The infrared sensor can accurately monitor the position of the reflection mark, the high-precision detection capacity of the infrared sensor is guaranteed, the position information of the lift car can be accurately mastered in time in the elevator running process, and stopping and running of the elevator can be accurately controlled advantageously, the fixing plate is located at the upper end of the guide rail and connected with the buffer spring in a welded mode, and the telescopic rod is arranged in the buffer spring. A buffer plate is installed at the bottom and is in sliding connection with a sliding groove, when the lift car crosses over the safety limiting device and is still not stopped, a buffer spring can be compressed and stretched, a telescopic rod absorbs and relieves the force as much as possible in time, impact force is reduced, an elevator structure is protected, and accidental impact or vibration influences on passengers are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety, in particular to a safety limiter for an elevator hoist. Background Art

[0002] In the elevator control system, a limit switch is generally set at the upper and lower end stations of the shaft, and a striker is set on the elevator car. When the elevator exceeds the end station and continues to run, the striker will trigger the limit switch. After the limit switch is activated, the elevator control system will stop output and force the elevator to stop running, thereby preventing the elevator from hitting the top or bottom, ensuring the safety of the elevator passengers, and also ensuring the safety of the elevator maintenance personnel working in the shaft.

[0003] At present, temporary elevator hoists are built at construction sites. Since mechanical limiters are relatively cheap, mechanical safety limiters are used to prevent the elevator from hitting the top or the ground. However, the on-site construction environment is complicated and there are many dust particles. Mechanical limiters are prone to wear due to long-term use, which affects their performance and life. In addition, mechanical limiters have a slow response speed and require longer time to respond and stop the elevator operation, increasing the probability of accidents. Utility Model Content

[0004] The purpose of the utility model is to provide a safety limiter for an elevator hoist to solve the problems in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a safety limiter for an elevator hoist, comprising a guide rail and a safety limit mechanism, a car is arranged on the inner side of the guide rail, pulleys are arranged on both sides of the car, a collision bow is arranged on one side of the car, a safety limit mechanism is arranged on the outer side of the guide rail, a bracket is arranged on the outer side of the guide rail, a mechanical limit switch is arranged on the inner side of the bracket, an infrared sensor is arranged on the inner side of the guide rail, a reflective mark is arranged on the top of the car, an electrical control cabinet is arranged on the outer side of the guide rail, a fixed plate is arranged on the upper end of the guide rail, a buffer spring is arranged at the bottom of the fixed plate, a telescopic rod is arranged inside the buffer spring, a buffer plate is arranged at the bottom of the telescopic rod, and a slide groove is arranged on the right side of the buffer plate.

[0006] Preferably, the bracket is connected to the mechanical limit switch by screws, and the position of the mechanical limit switch can fit the striker.

[0007] Preferably, the guide rail and the infrared sensor are connected by screws, and the guide rail and the infrared sensor fit tightly.

[0008] Preferably, the car and the reflective marker are connected by screws, and the car and the reflective marker are tightly fixed.

[0009] Preferably, the fixing plate and the buffer spring are welded, and the buffer plate and the buffer spring are welded.

[0010] Preferably, the buffer spring and the telescopic rod are sleeved, the telescopic rod and the fixed plate are welded, and the telescopic rod and the buffer plate are welded.

[0011] Preferably, the buffer plate and the slide groove are slidably connected, and the outer diameter of the buffer plate matches the inner diameter of the slide groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] An infrared sensor is installed on the inner side of the guide rail, which is tightly fixed on the guide rail and monitors the position of the car. A reflective mark is installed on the top of the car and is used in conjunction with the infrared sensor to ensure that the infrared sensor can accurately monitor the position of the reflective mark. The high-precision detection capability of the infrared sensor can timely and accurately grasp the position information of the car during elevator operation, which helps to accurately control the parking and operation of the elevator. The fixed plate is located at the upper end of the guide rail and is welded to the buffer spring. A telescopic rod is arranged in the buffer spring, and a buffer plate is installed at the bottom, which forms a sliding connection with the slide groove. When the car has not stopped after passing the safety limit device, the buffer spring can be compressed and extended, and the telescopic rod tries to absorb and slow down these forces in time to reduce the impact force, protect the elevator structure and passengers, and reduce the impact of unexpected impact or vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall structure on the left side of the utility model;

[0016] Figure 3 This is a schematic diagram of the enlarged structure of point A of the utility model;

[0017] Figure 4 This is a schematic diagram of the enlarged structure of point B of the utility model;

[0018] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of the guide rail, the fixing plate, the buffer spring, the telescopic rod, the buffer plate and the slide groove.

[0019] Numbers in the figure: 1. Guide rail; 2. Car; 3. Pulley; 4. Bow; 5. Safety limit mechanism; 501. Bracket; 502. Mechanical limit switch; 503. Infrared sensor; 504. Reflective mark; 505. Electrical control cabinet; 506. Fixed plate; 507. Buffer spring; 508. Telescopic rod; 509. Buffer plate; 510. Slide groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 The utility model provides a technical solution: a safety limiter for an elevator hoist, a safety limiter for an elevator hoist, comprising a guide rail 1 and a safety limiter mechanism 5, a car 2 is arranged on the inner side of the guide rail 1, pulleys 3 are arranged on both sides of the car 2, a collision bow 4 is arranged on one side of the car 2, a safety limiter mechanism 5 is arranged on the outer side of the guide rail 1, a bracket 501 is arranged on the outer side of the guide rail 1, a mechanical limit switch 502 is arranged on the inner side of the bracket 501, an infrared sensor 503 is arranged on the inner side of the guide rail 1, a reflective mark 504 is arranged on the top of the car 2, an electrical control cabinet 505 is arranged on the outer side of the guide rail 1, a fixed plate 506 is arranged on the upper end of the guide rail 1, a buffer spring 507 is arranged at the bottom of the fixed plate 506, a telescopic rod 508 is arranged inside the buffer spring 507, a buffer plate 509 is arranged at the bottom of the telescopic rod 508, and a slide groove 510 is arranged on the right side of the buffer plate 509.

[0022] Furthermore, the bracket 501 and the mechanical limit switch 502 are connected by screws, and the position of the mechanical limit switch 502 can be aligned with the striker bow 4. Through such a setting, it can be ensured that when the elevator reaches the safety limit, the mechanical limit switch 502 can be triggered in time, thereby effectively preventing the elevator from exceeding or falling short of the safety limit position, thereby improving the safety and reliability of the elevator.

[0023] Furthermore, the guide rail 1 and the infrared sensor 503 are connected by screws, and the guide rail 1 and the infrared sensor 503 fit tightly. Through such a setting, the accurate monitoring and reaction speed of the infrared sensor 503 to the position of the car 2 can be improved, ensuring that the position information of the car 2 is accurately grasped during the operation of the elevator, which helps to accurately control the parking and operation of the elevator.

[0024] Furthermore, the car 2 and the reflective marker 504 are connected by screws, and the car 2 and the reflective marker 504 are tightly fixed. Through such a setting, it is ensured that the reflective marker 504 can always remain stable when the car 2 moves, and will not shift due to vibration or movement, thereby ensuring the accuracy and reliability of the reflective marker 504 when detected by the infrared sensor 503.

[0025] Furthermore, the fixing plate 506 and the buffer spring 507 are welded, and the buffer plate 509 and the buffer spring 507 are welded. This arrangement can effectively prevent components from falling off or moving due to vibration or impact in the elevator, thereby ensuring long-term reliability and stability.

[0026] Furthermore, the buffer spring 507 and the telescopic rod 508 are socketed, the telescopic rod 508 and the fixed plate 506 are welded, and the telescopic rod 508 and the buffer plate 509 are welded. Through such an arrangement, the impact force of the elevator can be effectively absorbed, protecting the elevator and passengers from unexpected impact or vibration.

[0027] Furthermore, the buffer plate 509 and the slide groove 510 are slidably connected, and the outer diameter of the buffer plate 509 matches the inner diameter of the slide groove 510. Through such a setting, the impact and vibration generated during the operation of the elevator can be effectively adjusted and absorbed, thereby increasing safety.

[0028] Working principle: First, the car 2 moves up and down through the guide rail 1. A pulley 3 is arranged on the outside of the car 2 to ensure the stable lifting and lowering of the car 2. The mechanical limit switch 502 is connected to the guide rail 1 through the bracket 501, and its position is aligned with the striker 4. When the car 2 moves to the safety limit position, the striker 4 touches the mechanical limit switch 502 to trigger it, which can ensure that the car 2 stops running when it reaches the safety height to prevent it from exceeding or falling short of the safety limit position, thereby improving the safety and reliability of the elevator. An infrared sensor 503 is installed on the inside of the guide rail 1, which is tightly fixed on the guide rail 1 and monitors the position of the car 2. A reflective mark 504 is installed on the top of the car 2, which is used in conjunction with the infrared sensor 503 to ensure that the infrared sensor 503 can accurately By monitoring the position of the reflective mark 504 and the high-precision detection capability of the infrared sensor 503, the position information of the car 2 can be grasped in a timely and accurate manner during the operation of the elevator, which is helpful to accurately control the parking and operation of the elevator. The fixed plate 506 is located at the upper end of the guide rail 1 and is welded to the buffer spring 507. A telescopic rod 508 is arranged in the buffer spring 507, and a buffer plate 509 is installed at the bottom, which forms a sliding connection with the slide groove 510. When the car 2 has not stopped after passing the safety limit device, the buffer spring 507 can be compressed and stretched, and the telescopic rod 508 can absorb and slow down these forces as much as possible in time to reduce the impact force, protect the elevator structure and passengers, and reduce the impact or vibration. In this way, the use process of a safety limiter for an elevator hoist is completed.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator hoist safety limiter, comprising a guide rail (1) and a safety limiter mechanism (5), characterized in that: A car (2) is arranged on the inner side of the guide rail (1), pulleys (3) are arranged on both sides of the car (2), a collision bow (4) is arranged on one side of the car (2), a safety limit mechanism (5) is arranged on the outer side of the guide rail (1), a bracket (501) is arranged on the outer side of the guide rail (1), a mechanical limit switch (502) is arranged on the inner side of the bracket (501), an infrared sensor (503) is arranged on the inner side of the guide rail (1), and the top of the car (2) is provided with a plurality of protective films. A reflective mark (504) is arranged on the outside of the guide rail (1), an electrical control cabinet (505) is arranged on the outside of the guide rail (1), a fixing plate (506) is arranged on the upper end of the guide rail (1), a buffer spring (507) is arranged at the bottom of the fixing plate (506), a telescopic rod (508) is arranged inside the buffer spring (507), a buffer plate (509) is arranged at the bottom of the telescopic rod (508), and a slide groove (510) is arranged on the right side of the buffer plate (509).

2. The elevator hoist safety limiter according to claim 1, characterized in that: The bracket (501) and the mechanical limit switch (502) are connected by screws, and the position of the mechanical limit switch (502) can be aligned with the striker (4).

3. The elevator hoist safety limiter according to claim 1, characterized in that: The guide rail (1) and the infrared sensor (503) are connected by screws, and the guide rail (1) and the infrared sensor (503) are tightly fitted.

4. The elevator hoist safety limiter according to claim 1, characterized in that: The car (2) and the reflective marker (504) are connected by screws, and the car (2) and the reflective marker (504) are tightly fixed.

5. The elevator hoist safety limiter according to claim 1, characterized in that: The fixing plate (506) and the buffer spring (507) are welded, and the buffer plate (509) and the buffer spring (507) are welded.

6. The elevator hoist safety limiter according to claim 1, characterized in that: The buffer spring (507) and the telescopic rod (508) are sleeved, the telescopic rod (508) and the fixed plate (506) are welded, and the telescopic rod (508) and the buffer plate (509) are welded.

7. The elevator hoist safety limiter according to claim 1, characterized in that: The buffer plate (509) and the slide groove (510) are slidably connected, and the outer diameter of the buffer plate (509) matches the inner diameter of the slide groove (510).

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